Sheave for pulley-blocks



0. H. HADLEYL sheave for Pulley-Blocks.

No. 223,795. Patented Jan. 20, 1880 v 1' wnngss INVENTOB:

ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES H. HADLEY, OF NEW LONDON, CONNECTICUT.

SH EAVE FOR PU LLEY-BLOCKS.

SPECIFICATION formingpart of Letters Patent No. 223,795, dated January20, 1880.

Application filed October 15, 1879.

To all whom it may concern Be it known that I, CHARLES H. HADLEY, of NewLondon, in the county of New London and State of Connecticut, haveinvented certain new and useful Improvements in Sheaves forTackle-Blocks; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it ap pertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specification.

This invention relates to sheaves or pulleys for tackle-blocks which areprovided with devices for lessening friction and strain; and it consistsin the construction and combination hereinafter particularly set forthand claimed.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved sheave, one of its side plates having been removed. Fig. 2represents a side elevation of said sheave, one of its side plates andall of its loose anti-friction devices having been removed; and Figs. 3,4, and 5 represent, respectively, detail views of said detached sideplate, the loose inner ring, and one of the numerous rollers. Fig. 6 isa vertical sectional view of my sheave.

A designates the wooden part of the sheave, which is grooved in itsperiphery, as usual,

and provided with a circular central recess to receive the anti-frictiondevices hereinafter described. An annular metallic bushing, B, lines theinterior of said sheave, surrounding said central recess or opening.

0 O designate two metal side plates, of circular form and less diameterthan said sheave,

which are set into the sides of the latter, and

secured in any convenient manner thereto. These plates have centralopenings, 0 c, to allow the passage through them of the shaft or spindleon which the sheave turns. D designates a loose metallic ring or hub,which sets between said plates so that its central opening (thoughsomewhat smaller) makes the transverse passage from opening 0 to openinga continuous. This ring is concentric with the aforesaid shaft orspindle, and surrounds the same. E designates a number of anti-frictionrollers, which are arranged in the annular space between said ring D andbushing B, so as to fill said space. They turn freely against oneanother and against said or attachment whatsoever.

As the aforesaid devices B, E, and D are all of the same material, theywill wear evenly, and bushing B protects the wooden part of the sheaveagainst any wear whatsoever. The sheave will therefore last a very longtime.

The loose arrangement of the anti-friction devices D and E causes thesheave to work very easily. The extreme simplicity of form of parts B,D, and E, which are all plain cylinders, and O and O, which are circles,renders their construction bycasting very easy, and nothing, moreremains but the turning of the wooden part of the sheave.

Owing to the absence of any unusual forms and the reduction of the partsof the device to the lowest possible number, I am enabled to manufacturethese sheaves very cheaply,

and to put them upon the market at a low figure, notwithstanding theirobvious excellence.-

I am aware that sheaves have heretofore been constructed with a loosebearing-ring surrounded by anti-friction rolls, said rolls and ringbeing held in place by an angle-iron plate, and I do not claim suchconstruction; but

What I do claim, and desire to secure by ing series of unjournaledrotary rolls, and a fixed cylindrical outer bearing.

In testimony that I claim the foregoing I have hereunto set my hand this9th day of October, 1879. A

CHAS. H. HADLEY.

Witnesses:

W. H. BABGOCK, AMos MALLORY.

